If cosA=cos B, then when does A=B? (Always, sometimes, never, infinite etc).
Follow Math Help Forum on Facebook and Google+
If you work on the interval , then
So what is the answer.. Never or sometimes?
it is always the same when it is a sign identity
since would just be a reflection of off the x axis then
Last edited by bigwave; February 4th 2010 at 12:10 PM.
View Tag Cloud